AiChatWindow derived the open page via useParams(), but it's mounted in a
pathless parent layout route where :pageSlug isn't matched, so useParams()
returned {} and openPage was ALWAYS null — the agent never received current-page
context (couldn't resolve 'this page'/'the current page'). Derive pageSlug from
useMatch('/s/:spaceSlug/p/:pageSlug') against the full pathname instead, so it
resolves regardless of where the component sits in the route tree. No-match
behavior is unchanged (undefined -> query disabled -> openPage null).
Addresses Hardness #1 of #43. Hardness #2 (proxy resilience: a get_current_page
tool / hidden user-message context so identity doesn't depend on the system
prompt surviving CLIProxyAPI) remains open.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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